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River Montessori Charter School

EIN 27-0431277 · Petaluma, CA

Public records show a registered, tax-exempt organization in good standing.

LegitimacyPassesRegistration and standingFinancial healthWeak44 out of 100GovernanceStrong100 out of 100Impact evidenceDescribes programsHow well its results are evidenced

What it says it does

OUR MISSION AT RIVER MONTESSORI CHARTER SCHOOL IS TO PROVIDE STUDENTS WITH A LEARNING CULTURE GROUNDED IN MONTESSORI PHILOSOPHY. THIS HISTORICALLY PROVEN EDUCATIONAL MODEL SUPPORTS THE WHOLE CHILD, CREATES LIFELONG LEARNERS, AND EDUCATES FOR PEACE. (CONT. ON SCH. O)THE RESULTING ACADEMIC EXCELLENCE IS SUPPORTED BY A PREPARED CLASSROOM ENVIRONMENT THAT INSPIRES SELF-PACED, INDIVIDUALIZED DISCOVERY; A LOVE OF LEARNING; AND RESPECT FOR SELF, OTHERS, AND THE ENVIRONMENT.

Income
$2.2 million
Spending
$2.3 million
Spent on programs
82%
Reserves
0.7 months of spending
Largest source of income
government grants, 87%
Employees
37
Volunteers
35
Highest pay
$178,150, executive director/superintendent

Source: Form 990 for the year ending June 30, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Financial health

Weak: 44 out of 100. Higher than 20% of charities in its peer group (education, $1m to $10m).

  • Reserves

    4 of 35

    Spendable reserves would cover 0.7 months of spending.

  • Debt

    2 of 20

    It owes 87% of what it owns.

  • Living within its means

    8 of 15

    Spending exceeded income by 5% of income.

  • Income trend

    15 of 15

    Income rose 13% on the year before.

  • Spending floor

    15 of 15

    82% of spending went to programs and raising each dollar of donations cost 0 cents.

Source: Form 990 for the year ending June 30, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Governance

Strong: 100 out of 100. Higher than 74% of charities in its peer group (education, $1m to $10m).

  • Independent board

    25 of 25

    6 of 6 voting board members are independent.

  • Conflict of interest policy

    15 of 15

    Has a written conflict of interest policy.

  • Whistleblower policy

    8 of 8

    Has a written whistleblower policy.

  • Record keeping policy

    7 of 7

    Has a written policy on keeping and destroying records.

  • Board minutes

    5 of 5

    Keeps minutes of board meetings.

  • Board sees the tax return

    10 of 10

    Gave the board a copy of this return before filing it.

  • Pay set independently

    5 of 5

    Sets its chief executive's pay through independent review and comparison.

  • Independent check of accounts

    15 of 15

    Its accounts were audited by an independent accountant.

  • No reported misuse

    10 of 10

    Reports no diversion of assets, excess benefits or loans to insiders.

Source: Form 990 for the year ending June 30, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Impact evidence

Describes programs. Its tax return describes what it does but we have found no measurable results in it.

Programs described in its return (1)
  1. $1.9 million spent. RIVER MONTESSORI CHARTER SCHOOL (RMCS) IS A FULLY NON-PROFIT AND INDEPENDENT ORGANIZATION WHICH PROUDLY SERVES A BEAUTIFUL AND DIVERSE POPULATION OF APPROXIMATELY 150 CHILDREN FROM TRANSITIONAL KINDERGARTEN - SIXTH GRADE WITH A FREE AND PUBLIC MONTESSORI EDUCATION. RMCS IS A LEARNING COMMUNITY WHERE CHILDREN ARE INSPIRED TO REALIZE THEIR ACADEMIC, PERSONAL, AND SOCIAL POTENTIAL TO BECOME GLOBAL CITIZENS. THE HISTORICALLY PROVEN MONTESSORI EDUCATIONAL MODEL SUPPORTS THE WHOLE CHILD, CREATES LIFELONG LEARNERS, AND EDUCATES FOR PEACE. THE RESULTING ACADEMIC EXCELLENCE IS SUPPORTED BY A PREPARED CLASSROOM ENVIRONMENT THAT INSPIRES SELF-PACED, INDIVIDUALIZED DISCOVERY AND A LOVE OF LEARNING, AS WELL AS RESPECT FOR SELF, OTHERS, AND THE ENVIRONMENT.

Source: Form 990 for the year ending June 30, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Legitimacy checks

  1. Is it registered with the IRS? Passed.

    Listed in the IRS master file of tax-exempt organizations as a 501(c)(3) charitable organization.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.

  2. Has the IRS revoked its tax-exempt status? Passed.

    Not on the IRS automatic revocation list.

    Source: Automatic revocation of exemption list, Internal Revenue Service, file dated October 13, 2026.

  3. Are donations tax-deductible? Passed.

    On the IRS list of organizations eligible to receive tax-deductible contributions.

    Source: Publication 78 data: organizations eligible for tax-deductible contributions, Internal Revenue Service, file dated October 13, 2026.

  4. Is it keeping up with its IRS filings? Passed.

    Most recent return on file covers the year ending June 2025.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.

  5. How long has it been tax-exempt? Passed.

    Recognized by the IRS since March 2015.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.

  6. Is it in good standing with state regulators? Passed.

    Not on California's list of charities barred from soliciting. Other states are not yet checked.

    Source: May Not Operate or Solicit for Charitable Purposes list, California Attorney General, Registry of Charities and Fundraisers, file dated October 21, 2026.

Ratings and checks are our reading of public records, using the published method. They are not a statement about anyone's honesty. If you work for this organization, you can send corrections or results, confirm you want gifts through Veridonate, or ask to be removed from giving.